Zin and Penta

Zinc Chloride/Copper Sulphate: water-borne non-fixing type: These
are single salts and offer limited protection. They are highly acidic and can
cause corrosion of metal fittings. Zinc Chloride is highly hygroscopic and
treated bamboo will give a wet look in rainy season. This can adversely
help paints and other finishes.

Sodium Penta Chloro Phenate (NaPCP): water-borne non-fixing
type: It is basically a fungicide. It is also applied with boric borax for
protection during shipment and storage of green bamboo. But due to its
toxic nature it has been banned in several countries. It is the most
effective chemical to prevent moulds and blue stain fungi.